Swimming at the 2013 World Aquatics Championships – Women's 50 metre butterfly
The women's 50 metre butterfly event in swimming at the 2013 World Aquatics Championships took place on 2–3 August at the Palau Sant Jordi in Barcelona, Spain.Records
Prior to this competition, the existing world and championship records were:Results
Heats
The heats were held at 10:24.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 5 | Francesca Halsall | | 25.69 | Q |
| 1 | 7 | 4 | Jeanette Ottesen | | 25.69 | Q |
| 3 | 7 | 6 | Lu Ying | | 25.82 | Q |
| 4 | 5 | 8 | Brittany Elmslie | | 26.03 | Q |
| 5 | 5 | 5 | Christine Magnuson | | 26.12 | Q |
| 6 | 7 | 5 | Inge Dekker | | 26.15 | Q |
| 7 | 5 | 3 | Dana Vollmer | | 26.29 | Q |
| 8 | 5 | 4 | Ranomi Kromowidjojo | | 26.31 | Q |
| 9 | 7 | 7 | Silvia di Pietro | | 26.31 | Q |
| 10 | 7 | 3 | Kimberly Buys | | 26.35 | Q |
| 11 | 6 | 6 | Sophia Batchelor | | 26.45 | Q |
| 11 | 7 | 0 | Farida Osman | | 26.45 | Q |
| 13 | 6 | 9 | Tao Li | | 26.48 | Q |
| 14 | 5 | 6 | Svetlana Chimrova | | 26.51 | Q |
| 15 | 7 | 8 | Sandrine Mainville | | 26.52 | Q |
| 16 | 6 | 3 | Mélanie Henique | | 26.54 | |
| 16 | 6 | 8 | Alexandra Wenk | | 26.54 | |
| 18 | 6 | 4 | Alicia Coutts | | 26.56 | |
| 19 | 5 | 7 | Ilaria Bianchi | | 26.63 | |
| 20 | 7 | 2 | Daynara de Paula | | 26.68 | |
| 21 | 6 | 7 | Louise Hansson | | 26.71 | |
| 22 | 6 | 1 | Anna Dowgiert | | 26.72 | |
| 23 | 7 | 9 | Elmira Aigaliyeva | | 26.76 | |
| 24 | 6 | 2 | Ingvild Snildal | | 26.87 | |
| 25 | 5 | 2 | Noemie Thomas | | 26.88 | |
| 26 | 4 | 8 | Jeserik Pinto | | 26.94 | NR |
| 27 | 6 | 0 | Siobhan-Marie O'Connor | | 26.98 | |
| 28 | 5 | 0 | Amit Ivry | | 27.04 | |
| 29 | 4 | 3 | Carolina Colorado | | 27.18 | |
| 30 | 4 | 5 | Hwang Seo-Jin | | 27.22 | |
| 31 | 4 | 2 | Katarína Listopadová | | 27.32 | |
| 32 | 5 | 9 | Trudi Maree | | 27.40 | |
| 33 | 4 | 1 | Lisa Zaiser | | 27.41 | |
| 34 | 5 | 1 | Kristel Vourna | | 27.49 | |
| 35 | 4 | 6 | İris Rosenberger | | 27.66 | |
| 35 | 4 | 7 | Gabriela Ņikitina | | 27.66 | |
| 35 | 4 | 9 | Chan Kin Lok | | 27.66 | |
| 38 | 7 | 1 | Marie Wattel | | 27.77 | |
| 39 | 4 | 0 | Rita Medrano | | 28.20 | |
| 40 | 3 | 4 | Marie Meza | | 28.43 | |
| 41 | 3 | 6 | | | 28.52 | |
| 42 | 3 | 3 | Dorian McMenemy | | 28.53 | |
| 43 | 3 | 5 | María López Nery | | 28.84 | |
| 44 | 4 | 4 | Maria José Ribera | | 29.23 | |
| 45 | 1 | 3 | Ophelia Swayne | | 29.60 | |
| 46 | 3 | 2 | Dalia Torrez Zamora | | 29.62 | |
| 47 | 2 | 5 | Tegan McCarthy | | 30.17 | |
| 48 | 3 | 8 | Mira Shami | | 30.42 | |
| 49 | 3 | 0 | Felicity Passon | | 30.46 | |
| 50 | 3 | 1 | Emily Mueti | | 30.55 | |
| 51 | 2 | 3 | San Su Moe Theint | | 30.58 | |
| 52 | 3 | 9 | Irene Prescott | | 30.87 | |
| 53 | 2 | 6 | Deandra van der Colff | | 31.96 | |
| 54 | 3 | 7 | Oreoluwa Cherebin | | 32.23 | |
| 55 | 2 | 4 | Afsana Ismayilova | | 32.29 | |
| 56 | 2 | 1 | Johanna Umurungi | | 32.35 | |
| 57 | 2 | 8 | Osisang Chilton | | 33.92 | |
| 58 | 2 | 7 | Shreya Dhital | | 34.01 | |
| 59 | 2 | 2 | Angel de Jesus | | 34.82 | |
| 60 | 1 | 4 | Danisha Paul | | 38.39 | |
| 1 | 5 | Emilia Pikkarainen | | | |
Swim-off
The swim-off was held at 11:29.
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Mélanie Henique | | 25.94 | Q |
| 2 | 8 | Alexandra Wenk | | 26.78 | |
Semifinals
The semifinals were held at 19:15.Semifinal 1
Semifinal 2
Final
The final was held at 18:02.
| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Jeanette Ottesen | | 25.24 | |
| 8 | Lu Ying | | 25.42 | AS |
| 5 | Ranomi Kromowidjojo | | 25.53 | |
| 4 | 3 | Francesca Halsall | | 25.70 | |
| 5 | 7 | Inge Dekker | | 25.83 | |
| 6 | 6 | Mélanie Henique | | 25.96 | |
| 7 | 1 | Farida Osman | | 26.17 | |
| 8 | 2 | Dana Vollmer | | 26.46 | |
